MCQ
In man the normal number of chromosomes is
- A$42$
- B$44$
- ✓$46$
- D$48$
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$A.$ Maternal mortality rate $(MMR)$ $B.$ Infant mortality rate $(IMR)$
$C.$ Number of people in reproducible age $D.$ Death rate
If mortality is represented by $-D$
If immigration is represented by $-I$
If emigration is represented by $-E$
If population density is represented by $-N$
Then population density at time $t+1$ is represented by